[SR-Users] Re: topos breaking route set on hairpin calls?
Hi Henning
> you've seems to have already found a workaround, as posted later.
>
> Generally, topos should work for PRACK, there were several enhancements/fixes
> committed in the last year.
Unfortunately, I didn't get it working as I anticipated.
CPE - REGISTRAR - CORE
I would like to hide topology towards the CPE so it does not have to
deal with recorded routes or via headers and also to hide those ip
addresses from the customer.
But I need those header between REGISTRAR and CORE kamailio instances.
For call from registrar to core I use a branch route trigger.
Within that trigger I do:
branch_route[BR_TO_CORE]
{
if ($avp(debug) > 0) {
xlog("L_INFO", "$cfg(route): Branching to Core\n");
}
$avp(droptopos) = 1;
}
event_route[topos:msg-outgoing] {
# Drop topology hiding towards core. We need those route header!
if ($avp(droptopos) == 1) {
xlog("L_INFO", "$cfg(route): DROP TOPOS\n");
drop;
}
$avp(droptopos) = 0;
}
Unfortunately this does not only affect the INVITE to the core, but
also drops topos on the other leg (replies like ringing and 200 OK from
core via registrar to customer) which then disclose all via information.
Is there a way to drop topos selectively only in one direction?
Mit freundlichen Grüssen
-Benoît Panizzon-
--
I m p r o W a r e A G-Leiter Commerce Kunden
__
Zurlindenstrasse 29 Tel +41 61 826 93 00
CH-4133 PrattelnFax +41 61 826 93 01
Schweiz Web http://www.imp.ch
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[SR-Users] Re: topos breaking route set on hairpin calls?
Hello, you've seems to have already found a workaround, as posted later. Generally, topos should work for PRACK, there were several enhancements/fixes committed in the last year. Cheers, Henning -- Henning Westerholt – https://skalatan.de/blog/ Kamailio services – https://gilawa.com -Original Message- From: Benoît Panizzon Sent: Thursday, February 2, 2023 8:51 AM To: sr-users@lists.kamailio.org Subject: [SR-Users] topos breaking route set on hairpin calls? Hi Having this situation while elaborating topos in lab. * Kamailio Registration Instance with topos enabled where customers are registered. * Kamailio Core Instance with Dialogue enabled and handling interconnections. Calls in transit from customer to IC work flawlessly, topos does what it should, hides and restores headers needed on the core. But I have run into an issue with customer calling another customer on same registrar instance. To generate a CDR with diaglogue and for decision where to route the calls to (registrar is kept simple and only handles registrations and locations), those calls are also routed via core. This works as long as PRACK is disabled. When PRACK is enabled and CPE B is requesting 100rel, the PRACK send from CPE A has no route set (it was removed by topos). Therefore the PRACK only makes it to the core who then does not know where to route that PRACK. It looks like topos on the REG only restores ONE Route pointing to the core (maybe because the 2nd one pointed to itself?) header when restoring them. I have attempted to spam more record_route() here and there in the config of the core and the registrar to try to force creation of route headers, but failed. Is this a known limitation of using topos? -- Mit freundlichen Grüssen -Benoît Panizzon- @ HomeOffice und normal erreichbar -- I m p r o W a r e A G-Leiter Commerce Kunden __ Zurlindenstrasse 29 Tel +41 61 826 93 00 CH-4133 PrattelnFax +41 61 826 93 01 Schweiz Web http://www.imp.ch __ __ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-le...@lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe: __ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-le...@lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:
[SR-Users] Re: topos breaking route set on hairpin calls?
Hi
I might have figured out how to do it... I have to suppress topoligy
hiding when not talking to a CPE.
branch_route[BR_TO_CORE]
{
$var(droptopos) = 1;
}
event_route[topos:msg-outgoing] {
if ($var(droptopos) == 1) {
drop;
}
}
Trace looks promising, now getting full route set being passed on.
--
Mit freundlichen Grüssen
-Benoît Panizzon- @ HomeOffice und normal erreichbar
--
I m p r o W a r e A G-Leiter Commerce Kunden
__
Zurlindenstrasse 29 Tel +41 61 826 93 00
CH-4133 PrattelnFax +41 61 826 93 01
Schweiz Web http://www.imp.ch
__
__
Kamailio - Users Mailing List - Non Commercial Discussions
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